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Otranto D, Mendoza-Roldan JA, Beugnet F, Baneth G, Dantas-Torres F. New paradigms in the prevention of canine vector-borne diseases. Trends Parasitol 2024; 40:500-510. [PMID: 38744542 DOI: 10.1016/j.pt.2024.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 05/16/2024]
Abstract
The prevention of canine vector-borne diseases (CVBDs) is pivotal for the health and welfare of dogs as well as for reducing their zoonotic risk to humans. Scientific knowledge gained in recent years contributed to the development of new strategies for the control of these diseases in different social and cultural contexts. Here, we discuss recent advances in the prevention of vector-borne pathogens (VBPs) affecting dogs with a focus on those of zoonotic relevance.
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Affiliation(s)
- Domenico Otranto
- Department of Veterinary Medicine, University of Bari, Valenzano, Italy; Department of Veterinary Clinical Sciences, City University of Hong Kong, Kowloon Tong, Hong Kong, China.
| | | | | | - Gad Baneth
- Koret School of Veterinary Medicine, Hebrew University, Rehovot, Israel
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Manoj RRS, Latrofa MS, Louni M, Laidoudi Y, Fenollar F, Otranto D, Mediannikov O. In vitro maintenance of the endosymbiont Wolbachia of Dirofilaria immitis. Parasitol Res 2023; 122:939-943. [PMID: 36810669 DOI: 10.1007/s00436-023-07789-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 02/01/2023] [Indexed: 02/24/2023]
Abstract
Wolbachia has an obligatory mutualistic relationship with many onchocercid nematodes of the subfamilies Dirofilariinae and Onchocercinae. Till date, no attempts have been made for the in vitro cultivation of this intracellular bacterium from the filarioid host. Hence, the current study attempted cell co-culture method using embryonic Drosophila S2 and the LD cell lines to cultivate Wolbachia from Dirofilaria immitis microfilariae (mfs) harvested from infected dogs. Microfilariae (mfs = 1500) were inoculated in shell vials supplemented with Schneider medium using both cell lines. The establishment and multiplication of the bacterium were observed during the initial inoculation, at day 0 and before every medium change (from days 14 to 115). An aliquot (50 µl) from each time point was tested by quantitative real-time PCR (qPCR). Comparing the average of Ct values, obtained by the tested parameters (i.e., LD/S2 cell lines and mfs with/without treatment), the S2 cell line without mechanical disruption of mfs provided the highest Wolbachia cell count by qPCR. Despite the maintenance of Wolbachia within both S2 and LD-based cell co-culture models for up to 115 days, a definitive conclusion is still far. Further trials using fluorescent microscopy and viable staining will help to demonstrate the cell line infection and viability of Wolbachia. Use of considerable amount of untreated mfs to inoculate the Drosophilia S2 cell lines, as well as the supplementation of the culture media with growth stimulants or pre-treated cells to increase their susceptibility for the infection and development of a filarioid-based cell line system are recommended for the future trials.
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Affiliation(s)
- Ranju Ravindran Santhakumari Manoj
- Department of Veterinary Medicine, University of Bari, Valenzano, Italy.
- Aix Marseille University, IRD, AP-HM, MEPHI, 13385, Marseille, France.
- IHU Méditerranée Infection, 13385, Marseille, France.
| | | | - Meriem Louni
- Aix Marseille University, IRD, AP-HM, MEPHI, 13385, Marseille, France
- IHU Méditerranée Infection, 13385, Marseille, France
| | - Younes Laidoudi
- Department of Veterinary Medicine, University of Bari, Valenzano, Italy
- Aix Marseille University, IRD, AP-HM, MEPHI, 13385, Marseille, France
- IHU Méditerranée Infection, 13385, Marseille, France
| | - Florence Fenollar
- IHU Méditerranée Infection, 13385, Marseille, France
- Aix Marseille University, IRD, AP-HM, SSA, VITROME, Marseille, France
| | - Domenico Otranto
- Department of Veterinary Medicine, University of Bari, Valenzano, Italy
- Faculty of Veterinary Sciences, Bu-Ali Sina University, Hamedan, Iran
| | - Oleg Mediannikov
- Aix Marseille University, IRD, AP-HM, MEPHI, 13385, Marseille, France.
- IHU Méditerranée Infection, 13385, Marseille, France.
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Alfonso Mendoza-Roldan J, Napoli E, Perles L, Marino M, Spadola F, Berny P, España B, Brianti E, Beugnet F, Otranto D. Afoxolaner (NexGard®) in pet snakes for the treatment and control of Ophionyssus natricis (Mesostigmata: Macronyssidae). Parasit Vectors 2023; 16:6. [PMID: 36609309 PMCID: PMC9825044 DOI: 10.1186/s13071-022-05611-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 12/06/2022] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Ophionyssus natricis is the main species of mite that infests captive reptiles. High infestations may result in the host experiencing general discomfort and deleterious effects, even death. Moreover, O. natricis is an important vector of reptile vector-borne diseases and is considered to be the putative vector of the Reptarenavirus, the causal agent of the inclusion body disease. Despite the cosmopolitan distribution of O. natricis in captive reptiles, treatment options are limited. The aim of the present study was to assess the efficacy of afoxolaner (NexGard®; Boehringer Ingelheim, Ingelheim, Germany) in heavily infested, privately owned snakes, evaluate the prevalence of mites and drug availability in the plasma of treated snakes (pharmacokinetics) and perform a clinical examination of animals. METHODS The study was conducted in two snake breeding facilities, where many snakes were infested with mites. Each animal was clinically examined and weighed, and mite infestations were assessed on the animals and in their enclosures (environment). Animals were treated with a dose of 2.5 mg afoxolaner per kilogram body weight (2.5 mg/kg) administered orally. All animals were examined pre-treatment (T0) and at various time points post-treatment (T1, 6 h; T2, 24 h; T3, 14 days; T4, 28 days). The collected mites were morphologically identified at the species level and the species identity also confirmed molecularly. RESULTS Overall, 81 snakes from the two participating facilities (i.e. 70 from site 1 and 11 from site 2) were screened, and 31 (38.3%) snakes were found to have at least one mite. All mites were identified morphologically and molecularly as O. natricis. Lampropeltis was the genus of snakes with highest number of infested individuals. Mites were found to be alive on snakes at T1, but at T2 only dead mites were observed, and at T3 and T4 mites were no longer present on the animals or in their environment. No side effects were observed in the treated snakes. CONCLUSIONS A single oral administration of afoxolaner at 2.5 mg/kg was a safe treatment for snakes and 100% effective for the eradication of natural O. natricis infestation without the need to treat the environment of the snake.
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Affiliation(s)
| | - Ettore Napoli
- grid.10438.3e0000 0001 2178 8421Department of Veterinary Sciences, University of Messina, Messina, Italy
| | - Livia Perles
- grid.7644.10000 0001 0120 3326Department of Veterinary Medicine, University of Bari, Valenzano, Italy
| | - Matteo Marino
- grid.10438.3e0000 0001 2178 8421Department of Veterinary Sciences, University of Messina, Messina, Italy
| | - Filippo Spadola
- grid.10438.3e0000 0001 2178 8421Department of Veterinary Sciences, University of Messina, Messina, Italy
| | - Philippe Berny
- grid.434200.10000 0001 2153 9484Toxicology Lab, Vetagro Sup., 1 Av Bourgelat, 69280 Marcy L’étoile, France
| | - Bernadette España
- grid.434200.10000 0001 2153 9484Toxicology Lab, Vetagro Sup., 1 Av Bourgelat, 69280 Marcy L’étoile, France
| | - Emanuele Brianti
- grid.10438.3e0000 0001 2178 8421Department of Veterinary Sciences, University of Messina, Messina, Italy
| | - Frederic Beugnet
- grid.484445.d0000 0004 0544 6220Boehringer Ingelheim Animal Health, Lyon, France
| | - Domenico Otranto
- Department of Veterinary Medicine, University of Bari, Valenzano, Italy. .,Faculty of Veterinary Sciences, Bu-Ali Sina University, Hamedan, Iran.
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Segarra S. Nutritional Modulation of the Immune Response Mediated by Nucleotides in Canine Leishmaniosis. Microorganisms 2021; 9:2601. [PMID: 34946204 PMCID: PMC8703464 DOI: 10.3390/microorganisms9122601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/09/2021] [Accepted: 12/14/2021] [Indexed: 12/24/2022] Open
Abstract
Leishmaniasis is an emerging, uncontrolled, and neglected zoonotic disease. Climate change is contributing to its ongoing global expansion. The dog is the main reservoir; hence the importance of implementing effective treatment, prevention, and control measures in this animal species to protect public health. However, although the standard treatment for canine leishmaniosis (CanL) is effective, it does not provide full parasitological clearance, and side effects and drug resistance have been described. The host's immune system plays a key role in the establishment and evolution of leishmaniasis. Dietary nucleotides modulate the immune response and, given their reported efficacy and safety in sick and clinically healthy Leishmania-infected dogs and because they represent a sustainable option with no associated side effects or resistance, they could be included within the prevention, treatment, and control strategies for leishmaniasis. This article briefly summarizes the scientific literature on CanL management, including unresolved issues, and reviews the scientific evidence on immunomodulatory effects of dietary nucleotides in different animal species. It also proposes a CanL management algorithm, including nucleotides. It is concluded that nutritional modulation of the immune response with nucleotides can contribute to better management of leishmaniasis following a One Health approach, especially in the COVID-19 era.
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Affiliation(s)
- Sergi Segarra
- R&D Bioiberica S.A.U., 08950 Esplugues de Llobregat, Spain
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Safarov A, Akramova F, Azimov D, Mihalca AD, Ionică AM. Updates on the distribution and host spectrum of Dirofilaria repens in the Republic of Uzbekistan. Parasitol Res 2021; 120:3987-3992. [PMID: 34677665 DOI: 10.1007/s00436-021-07347-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/11/2021] [Indexed: 11/28/2022]
Abstract
Among the zoonotic mosquito-borne nematodes, Dirofilaria repens and Dirofilaria immitis (Spirurida, Onchocercidae) are highly significant from a public health perspective. While D. immitis is also of major veterinary concern, D. repens is regarded as less pathogenic for carnivores, but is the main causative agent of human dirofilariosis throughout the Old World. In the Republic of Uzbekistan, recent data refer exclusively to D. immitis infection in domestic and wild carnivores, while the current prevalence and distribution of D. repens remain unknown. Between 2015 and 2021, a total of 559 domestic and wild carnivore carcasses were collected and examined by necropsy. All subcutaneous nematodes were collected and identified morphologically. The overall prevalence of D. repens infection was of 11.03% in domestic dogs, Canis familiaris, and 9.29% in wildlife hosts: golden jackals, Canis aureus (11.76%), wolves, Canis lupus (9.09%), red foxes, Vulpes vulpes (9.23%), and jungle cats, Felis chaus (7.14%). Additionally, a human case of subcutaneous D. repens infection was also documented. The present study represents the first recent assessment of the occurrence of the zoonotic filarioid D. repens in the Republic of Uzbekistan. It indicates a wide distribution in domestic dogs and four species of wildlife hosts throughout the country, raising awareness on the public health risks associated with this parasite.
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Affiliation(s)
- Alisher Safarov
- State Committee of Veterinary and Livestock Development of the Republic of Uzbekistan, Tashkent, Uzbekistan.
| | - Firuza Akramova
- Institute of Zoology of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - Djalaliddin Azimov
- Institute of Zoology of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - Andrei D Mihalca
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca, Romania
| | - Angela M Ionică
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca, Romania
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